Sawmill set-works.



PATENTED DEC. 13, 1904.

T. S. WILKIN.

SAWMILL SET WORKS.

APPLIOATION FILED SEPT. 22. 1902.

2 SHEETS-SHEET 1.

H0 MODEL.

a wmliw.

PATENTED DEC. 13, 1904:.

T. S. 'WILKIN.

SAWMILL SET WORKS.

APPLICATION FILED 81312122, 1902.

2 SHEETS-SHEET 2.

N0. MODEL.

l i l M Md.

. .R ml

' NITED STATES Patented December 13, 1904.

THEODORE S. I/VILKIN, OF MILWVAUKEE, WISCONSIN.

SAWMILL SET-WORKS.

SPECIFICATION formingpart of Letters Patent No. 777,232, dated December 13, 1904.

7 Application filed September 22, 1902. Serial No. 124,385. (No model.)

T0 at whom it may concern.-

Be it known that I, THEODORE S. VVILKIN, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a new and useful Improvement in Sawmill Set- WVorks, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification.

This invention involves improved means in set'works for sawmills for adjusting or setting the set-works for setting up the knees the predetermined distanceand the means for setting up the knees when the set-works are adjusted.

This invention is an improvement on the construction shown and described in the application, Serial No. 94,930, for a patent for set-works for sawmills, filed by moon February 20, 1902, and for which PatentNo. E LA I9 was issued on November 17, 1903.

The invention consists of the mechanism, its parts, and combinations of parts, as herein described and claimed, or the equivalents thereof.

In the drawings, Figure 1 is a top plan view of my improved setworks shown in connection with a fragment of the carriage of a sawmill and the knees thereon, whereby the relations of the set-works to the carriage are shown. Fig. 2 is a transverse section on line 2 2 of Fig. l of the set-works looking toward the right. Fig. 3 is a view of some parts of the mechanism shown in Fig. 2 as seen from the left of the parts as shown in Fig. 2. Fig. 4 shows another form of device forconverting rotary into rectilinear motion, which de- Vice may be employed in place of the crank near the bottom of the drawing in Fig. 2.

In the drawings, A represents the log-carriage.

B B are fragments of the knees, mounted to slide on the head-blocks U U, which headblocks are rigid on and a part of the carriage.

2 2 are brackets or structure members rigid on and forming a part of the carriage A. A set-shaft 3 is revoluble in the heachblocks and in a bracket 2. The set-shaft is provided with pinions at t I, that mesh with racks on the under side on the knees B, whereby by the rol tation of the shaft the knees are set up or returned to initial position.

For rotating the shaft 3 I advisably provide an expansive power medium, preferably steam, and for such medium a cylinder 5, mounted on the carriage A, is employed, which cylinder is provided with a reciprocable piston and means for introducing steam or the expansive medium into the piston on each side thereof. The piston and the means for introducing the steam into the cylinder being a matter of common use are not shown in the drawings. A power-driven shaft 6, advisably made hollow, is mounted revolubly in brack ets 2 2 and on and about the shaft 3. This hollow power-driven shaft 6 is rotated by'the reciprocating movement of the stem 7 of the piston of the cylinder 5, and therefor racks are employed, preferably on a yoke 8, secured to the piston-stem 7, which racks on the legs of the yoke S mesh with pinions 9 9 on the shaft 6. A clutch 10, one member of which is rigid on the extremity of the hollow shaft 6 and the other member of which is splincd on the shaft 3, is adapted for coupling the shaft 3 revolubly with the hollow shaft 6. Normally the clutch is out of engagement.

For transmitting the rotary motion of the power-driven shaft 6 to the set-shaft 3 means are employed which are adapted to be so adjusted or set that the rotation of the powerdriven shaft 6 one complete revolution will rotate the set-shaft 3 to a predetermined extent in accordance with the position to which the set-works are adjusted or will not rotate the set-shaft 3 to any extent whatever, if desired, and the set-works areadjusted therefor. The length of the racks are such with reference to the pinio'ns on the power-driven shaft 6 with which they mesh that one complete movement of the racks in either direction will rotate the shaft 6 one revolution.

A pinion 11, fixed on the end of powerdriven shaft 6, conveniently by casting it integral with the shaft, meshes with a pinion on an intermediate shaft 12, mounted revolubly in brackets 2 2, and the shaft 12 is provided with a crank 13, and a rod 14 connects a wristpin on the crank 13 to an anchor-block 15, the

rod 14 being conveniently connected thereto by being pivoted on a stud-pin 16, fixed in the block, and a rod 17 connects the anchor-block 15 by being pivoted on the pin 16 to the wrist on a crank 18 on rock-shaft 19. The rockshaft 19 is mounted in brackets 2 2 on the carriage. The anchor-block 15 is mounted slidably on segmental guide 20, and this guide at its lower end is fixed on the axle of hand-lever 21, the axle being mounted revolubly in a bracket 2. The segmental guide 20 and the hand-lever 21 being fixed on a common axle are rigid to each other. A notched andgraduated segmental rack 22 is mounted on the carriage conveniently by means of bolts 23 23, that secure it adjustable endwise thereto, the bolt 23 at the lower end passing through an ear on the carriage and through an elongated slot in the rack, and the bolt 23 at the upper end passing through an arm 24 projecting upwardly from the carriage and through an elongated slot therefor in the rack 22. The hand-lever 21 straddles and swings on the rack 22,-which rack is in an arc concentric to the axle of the hand-lever 21. The hand-lever 21 is provided with spring-held catches 25, adapted to engage concurrently notches on the inner and outer edges of the rack. The rack is provided with such number of notches or teeth, only a few of which are shown, as adapts it for holding the lever at such points as it may be moved to, whereby the set-works may be adjusted for setting up the knees an exact distance from the one thirty-second of an inch to any great extent that would be required in the sawing of lumber.

The rock-shaft 19 is provided with two arms projecting therefrom radially in opposite directions, which are connected by the rods 26 26, respectively, to tilting pawls 27 28, both of which engage the ratchet-wheel 29 on the same side thereof. The ratchet-wheel 29 is fixed on the shaft 3. The attendant can lift the pawls 27 28 out of engagement with the ratchet-wheel 29 when it is necessary to rotate the shaft 3 in the opposite direction for returning the knees to initial position.

It should be understood that in use the setworks, by means of shifting the hand-lever 21, are to be set to the position required for moving the knees of the carriage up a predetermined distance, and thereupon by opening the throttle to the steam-cylinder and admitting steam at one side or the other of the piston the yoke 8 will be moved in one direction the extent of its travel, whereby the driven shaft 6 will be rotated one revolution and the set-shaft will be rotated to such extent as corresponds with the position at which the setworks have been set or adjusted. In fact,

when the set-works are adjusted in the position shown in Fig. 2, in which the lever-handle 21 is thrown up to its limit of travel, the driven shaft 6 can be rotated without rotating the shaft 3 to any extent whatever, because in the adjustment shown in Fig. 2 the rotation of the shaft 6 would merely cause the anchor-block 15 to reciprocate on the segmental guide 20 in an arc about the wrist on the crank 18 as an axis, and in such case the crank 18 and its rock-shaft 19 would not be oscillated, so that no movement would be communicated therefrom to the set-shaft 3; but when the leverhandle 2 is thrown down to any extent whatever from its highest position the segmental guide 20 is shifted into eccentric or tangential position with reference to the wrist on the crank 18, and thereupon when the driven shaft 6 is rotated the anchor-block 15 will travel in a path eccentric to the wrist on crank 18, whereby that crank and the rock-shaft 19 will be oscillated to a corresponding extent, and thereby the set-shaft 3 will be rotated correspondingly. It may also be noted that the set-works always stop at and start from a home positionthat is, aposition of the shafts 6 and 12 that is identical being determined by the movement of the piston and its stem 7 in the steam-cylinder to the limit of its travel in one direction, which always brings the shaft 6 into the same initial position. From this home position the set-works always start when the throttle is opened in making the movement resulting in setting up the knees the predetermined distance.

In Fig. 1 another form of crank device is shown, which may be used instead of the crank 13 on the shaft 12. In this form of device a disk 30 is provided with transverse slots 31 32, crossing each other at right angles at the center of the disk, and sliding blocks 33 3 1 are adapted to slide, respectively, in the slots 31 and 32, and the rod 14: is pivoted to these two blocks, the blocks being so disposed that when 33 is at the center of the disk the block 3& will be at the limit of its travel radially in its channel 32, and when the block 34: is at the center of the disk the block 33 will be at the limit of its travel radially in the slot 31, the blocks between these limits of travel being at corresponding distances from their respective limits of travel. As this form of device shown in Fig. 4 is adapted to produce two reciprocal movements of the rod 14: by one revolution of the disk, the pinion 11 must be made one-half the size it is, as shown in Fig. 2, or the pinion on shaft 12 must be doubled in size to secure a result corresponding with that obtained by the construction shown in Fig. 2.

What I claim as my invention is- 1. In sawmill set-works,means for adjusting the mechanism for setting up the mill-knees a predetermined distance, comprising a rockshaft having a crank, a rod connecting said crank to an anchor-block, a pivotally-adjustable segmental guide, said anchor-block being reciprocable on said guide the guide being so mounted and adjustable that the block sliding thereon will move in an arc concentric with the wrist of the crank or eccentric thereto according to adjustment of the guide, a rotating crank, and a rod connecting this rotating crank to said reciprocable anchor-block.

2. In sawmill set-works, means for adjusting the mechanism for setting up the mill-knees a predetermined distance, comprising a rockshafthaving a crank, a rod connecting said crank to an anchor-block, a segmental guide,

a hand-lever having a therewith rigid axle on which the segmental guide is fixed the axle being rotatable in a relatively stationary bearing, said anchor-block reciprocable on said guide the guide being so mounted and adjustable that the block sliding thereon will move in an arc concentric with the wrist of the crank or eccentric thereto according to ad justment of the guide, a rotating crank, and a rod connecting this rotating crank to said reciprocable anchor-block.

3. In sawmill set-works,means for adj usting the mechanism for setting up the mill-knees a predetermined distance, comprising a rock' shaft having a crank, means connecting said crank to an anchor-block, a segmental guide, a hand-lever rigid to and movable concentrically with said guide in a relatively stationary bearing, means for locking the guide releasably in adjusted position, said anchorblock reciprocable on said guide the guide being so mounted and adjustable that the block sliding thereon will move in an arc concentric with the wrist of the crank or eccentricthereto according to adjustment of the guide, a rotating crank, and means connecting this rotating crank operatively to said reciprocable anchorblock.

4. In sawmill set-works, a set-shaft, a rockshaft provided with a crank, means connecting the rock-shaft operatively to the set-shaft whereby the oscillation of the rock-shaft will rotate the setshaft, a reciprocable anchorblock, an adjustable guide for the anchorblock, means connecting the anchor-block to a crank on the rock-shaft, a rotatable shaft provided with a crank, means connecting the anchor-block with the crank of the rotatable shaft, and a driven shaft geared to said rotatable shaft.

5. In sawmill set-works, a set-shaft, a rockshaft provided with a crank, means connecting the rock-shaft operatively to the set-shaft whereby the oscillation of the rock-shaft will rotate the set-shaft, a reciprocable anchor- &

block, a segmental pivoted and adjustable guide for the anchor-block, means connecting the anchor-block to a crank on the rock-shaft, a rotatable shaft, means connecting the anchor-block with the rotatable shaft eccentrically, and a driven shaft geared to said rotatable shaft.

6. In sawmill set-works, a set-shaft, a rockshaft provided with a crank, means connecting the rock-shaft operativcly to the set-shaft whereby the oscillation of the rock-shaft will rotate the set-shaft, a reciprocablc anchorblock, a segmental pivoted and adjustable guide for the anchor-block, means for swinging and thereby adjusting said guide and for locking it releasably in adjusted position, means connecting the anchor-block to a crank on the rock-shaft, a rotatable shaft, means connecting the anchor-block with the rotatable shaft eccentrically, and a driven shaft geared to said rotatable shaft.

7. In sawmill set-works, a set-shaft, a rock shaft provided with a crank, means connecting the rock-shaft operatively to the set-shaft whereby the oscillation of the rock-shaft will rotate the set-shaft, a reoiprocable anchorblock, an adjustable guide for the anchorblock, means connecting the anchor-block to a crank on the rock-shaft, a rotatable shaft, means connecting the anchor-block with the rotatable shaft eccentrically, a driven shaft geared to said rotatable shaft, and reciprocable means adapted by its reciprocation to retate the driven shaft.

8. In sawmill set-works, a set-shaft, a rockshaft provided witha crank, means connecting the rock-shaft operatively to the set-shaft whereby the oscillation of the rock-shaft will rotate the set-shaft, a reciprocable anchorblock, an adjustable guide for the anchorblock, means connecting the anchor-block to a crank on the rock-shaft, a rotatable shaft, means connecting the anchor-block with the rotatable shaft eccentrically, a driven shaft geared to said rotatable shaft, and a steamactuated rcciprocable yoke adapted by its movement in each direction to rotate said driven shaft one complete revolution.

In testimony whereof I affix my signature in presence of two witnesses.

THEODORE E3. l/VILKIN. Witnesses:

G. 1. Behavior, ANNA V. FAUs'r. 

